Sawmill set-works.



PATENTED JUNE 25.

A. 0; OSBORN. SAWMILL SET WORKS.

APPLICATION FILED J 1906.

UN: 19 8 BKEETS-BKEET 1.

' PATENTED JUNE 25,1907.

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INVENTOR,

I ATTORNEYS 'A, o. osnomz. SAWMILL SET worms.

'APPLIOA'I'ION PILED JUNE 19, 1906.

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WITNESSES.-

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. PATENTED JUNE 25, 1907.

A. C. OSBORN.

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SAWMILL SET WORKS.. APPLIGATION FILED Jun 19, 1906.

UNITED STATES PATENT OFFICE.

ALEXANDER'O. OSBORN, OF CLARKSBURG, WEST VIRGINIA.

SAWMILL SET-WORKS.

Specification of Letters Patent.

PatentedJune 25, 1907.

Application filed 11111819, 1906. Serial No. 322,421.

To all whom it may concern.-

Be it known that I, ALEXANDER C. Os

BORN, a citizen of the United States, residing at Clarksburg, in the county of Harrison and State of WVest Virginia, have inventeda new and useful Sawmill Set-Works, of which the following is a specification.

This invention relates to saw mill. set works, and has for its principal object to provide anv apparatus by which the logs or timber may be advanced to proper position on the saw carriage for the purpose of permitting the cutting of slabs, boards, or other articles of various sizes.

A further object of the invention is to provide means in the natureof a spring or other energy storing member which is placed under stress during the forward feeding movement,

and at the end. of each complete movement is automatically released and allowed to act clutching apparatus is combined. with a suit-v able brake in order that the speed of return of the shaft and head block members and dogs may be placed under control.

With these and other objects in view, as

will more fully hereinafter appear, the inven-v tion consists in certain novel features of con-- struction and arrangement of parts, hereinafter fully described, illustrated in the ac companying drawings, and particularly pointed out in theappended claims, it being understood that variouschanges in the form,

works constructed in accordance with theinvention. Fig. 2 is a sectional-viewof a portion of thesame. Fig. 3 is-a transverse sectional elevation of the device on the line 33 of Fig. 2 showing the clutch disk in operative position. Fig. 4 is a similar view of a portion of the same showing the clutch disk in position to form a friction brake.

Fig. 5 is a detail cross sectional view through the hub of the clutch and brake operating lever.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The apparatus is shown in the drawings as applied to a saw mill set works of that general type in which the racks are stationary,

while the knees and operating parts of the mechanism advance to position the timber, although it will be understood that the mech anism is equally applicable for use in connection with the other type of machine, wherein the operating mechanism is stationary, while the racks are secured to and advance with the knees.

The knees 8 aresecured to a sill 9 which is free to slide on a frame including transverse bars 10. The sill is connected to bars or frames 10 and 10 that are provided with bearings for the reception of a longitudinally disposed shaft 11. This shaft is provided with a number of pinions 12 which engage with stationary racks 13, so that as the pin ions and the shaft revolve, the knees, the sill, and the operating mechanism as a Whole will advance for the purpose of positioning the timber.

Mounted loosely on the shaft 11 is a ratchet wheel 16, said ratchet wheel comprising a suitable disk 17 and a rim 18, which latter carries the ratchet teeth; The rim 18 is provided with a number of inwardly projecting teeth 19, that are arranged to enter notches 20 formed in the periphery of a combined drum and clutch disk 21, that normally is held in operative position by a coiled compression spring 22. The shaft is provided with a key-way in which is mounted a slidable key 23, having a projecting end portion 24. that fits within a suitable recessformed in the centralopening of the disk 21, and this serves to lock the disk to the shaft in order that rotative movement may be imparted to the disk and from thence to the ratchetv wheel, and said key also serves as a means. for transmitting movement to the disk in a direction lengthwise of the shaft to clutching and unclutching position. At one side of the disk and setting ratchet or ratchet wheel, the base is provided with an eye bolt or lug to which is pivoted the lower end of a clutch operating lever 26, and the hub of said lever embraces a collar 26 and is pivoted thereto by pins or screws 26 In the collar is an annular groove 27 that receives a projection 28 extending from the outer end of the key, the projection 28 turning idly within the groove during all the time the shaft is rotated, but when the lever is operated this movement is transmitted through the lug and key to the disk 21, and the latter may be forced from the position shown in Fig. 3 to the position shown in Fig. 4. WVhen moved to this latter position, the face of the disk engages against the face of a friction disk 30 that is rigidly secured to the part 17 of the setting ratchet or ratchet wheel, the disk thereupon serving as a brake to retard the rapid return movement of the shaft.

Pivoted on the shaft 11 are two U-shaped frames 33 and 34 that extend over the upper portion of the ratchet wheel, and to these are pivoted pawls 35 and 36, respectively, the pawls being arranged to engage with the ratchet teeth and the frames 33 and 34 being operated alternately for the purpose of advancing the pawls, and thus imparting a step by step rotative movement to the ratchet wheel. I

Near the front end of the base 10 are up right bearing brackets 37 which serve as supports for a short shaft 38, and to this shaft is secured a two armed lever 39, the arms being arranged diametrically opposite each other, and one end of said arms being connected by a rod 40 to the frame 33, while the other is connected to the frame 34 by a slightly curved arm 41.

To the shaft 38 is secured an operating lever which is arranged adjacent to an arcuate stop frame 46 extending upward from the base. This frame 46 carries near its forward end a fixed stop 47 against which the lever is moved at the completion of each for ward swing, and near the rear end of the frame are numerous openings 49 into any one of which a stop pin 50 may be adjusted, this pin determining the rearward movement of the lever, and thus permitting adjustment of the extent of movement of the ratchet wheel at each operation of said lever.

In the operation of the device, the lever is manipulated once or as many times as may be necessary to advance the setting ratchet the proper distance, and at the completion of the movement the lever 45 is pressed against the fixed sto 47. At this time the point of connection of lever 39 with the rod 40 will be at a point below a plane intersecting the axis of the shaft 38 and the point of connection of the rod 40 with the frame 33, so that the de vice will be automatically locked in its adjusted position and any rearward movement will be prevented, this insuring the utmost accuracy of feed and avoiding danger of damage to the saw through backward movement during the sawing operation.

During the operation of the device, a torsion spring 51 which encircles the set shaft and is secured at one end to a fixed point, and at the opposite end to the shaft, is wound up and placed under stress.

After the timber has been divided into the desired number of parts, the clutch operating lever 26 is moved for the purpose of throwing the disk 21 inward, thus releasing the teeth 19, and unlocking the ratchet wheel from the shaft. The inward movement of the disk 21 is continued until it engages with the friction disk 30, that is secured to the ratchet wheel, and as said ratchet wheel is held from movement by its pawls, the friction developed may be utilized in controlling the speed of return movement of the shaft and the unwinding of the spring 51.

With a device constructed in accordance with this invention, the timber may be advanced to new positions with the utmost accuracy, and will be held firmly locked in place during the sawing operation.

I claim 1. In a saw mill set works, the combination with the knees, of a set shaft, connections between the set shaft and the knees, a setting ratchet on the shaft, a combined clutching and brake disk keyed to the shaft and arranged to move longitudinally thereof,

means for moving said disk to clutch the setting ratchet and to bear against said setting ratchet and operate as a brake, and means for effecting a step by step rotative movement of the setting ratchet.

2. In a saw mill set works, the combination with the knees, of a set shaft, connections between the knees and the set shaft, a

setting ratchet mounted loosely on the shaft,

means for effecting a step by step rotative movement of the setting ratchet, a clutch disk mounted on the shaft, interengaging means between the periphery of the clutch disk and the setting ratchet, a slidable key carried by the shaft and having projections at both ends, one of said projections being arranged to engage a recess in the hub of the disk, a clutch operating lever, and a grooved hub or collar carried thereby and encircling the shaft, the second projection of the key being arranged to enter said groove, the lever being movable to force the disk from clutching position into frictional engagement with a portion of the setting ratchet to thereby form a brake for retarding reverse movement of the set shaft.

3. In a saw mill set works, the combination with the knees, of a set shaft, connec tions between the knees and the set shaft, a setting ratchet mounted loosely on the shaft, a combined clutch and friction disk revolu- IIC ble with the shaft, means for moving said disk lengthwise of the shaft to clutch the setting ratchet thereto or to frictionally engage said setting ratchet to retard return movement of the set shaft, and a spring connected to the set shaft and placed under stress during movement in one direction, said spring in unwinding tending to return the shaft and connected parts to initial position.

4. In a saw mill set Works, the combination with the knees, of a set shaft operatively connected thereto, a return spring connected to the set shaft, a setting ratchet mounted 1 loosely 011 the shaft and provided at one side with a recess, the rim of said setting ratchet having clutch teeth, a friction ring secured within the recessed portion of the setting ratchet, a combined clutching and friction disk revolulole with the shaft and movable longitudinally thereof, said disk having peripheral clutching teeth to engage with the similar teeth of the setting ratchet, a spring tending to hold said disk in clutching position, and means for moving the disk against the action of the spring into frictional engagement with the friction ring.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

ALEXANDER O. OSBORN.

Witnesses:

E; HUME TALBERT, M. J. WARRINER. 

